G650X-F650GS engine
 

Are the engines in the above bikes the same apart from the generator and cosmetically different casings?
Just wondering wether to keep an F650GS engine I have or sell it, if it will work in my G650X I might be tempted to hold onto it.

Pete

I think the head is different ... exhaust port in different place. From memory.

as part of the different generator, the F650 also has a heavier flywheel

That would be a different head if the exhaust port came out of it :eek3::D
Do you think the F would work with the G fuel/ign. system?

I am thinking about it too. as have access to a spare F650 engine ... i think the biggest issue is keeping the head from the G engine abd the rest from the F engine ... I cant see why that wouldnt work.